11973943 has 2 divisors, whose sum is σ = 11973944. Its totient is φ = 11973942.

The previous prime is 11973931. The next prime is 11973959. The reversal of 11973943 is 34937911.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 11973943 - 2⁵ = 11973911 is a prime.

It is equal to p₇₈₆₄₆₆ and since 11973943 and 786466 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11973443) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5986971 + 5986972.

It is an arithmetic number, because the mean of its divisors is an integer number (5986972).

Almost surely, 2^11973943 is an apocalyptic number.

11973943 is a deficient number, since it is larger than the sum of its proper divisors (1).

11973943 is an equidigital number, since it uses as much as digits as its factorization.

11973943 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 20412, while the sum is 37.

The square root of 11973943 is about 3460.3385672503. The cubic root of 11973943 is about 228.7770183182. Note that the first 3 decimals are identical.

The spelling of 11973943 in words is "eleven million, nine hundred seventy-three thousand, nine hundred forty-three".